noun
sideloaded app; unverified app; unofficial app
Colloquial term for a smartphone app obtained outside official stores, often implying potential security risks or lack of vetting. The prefix 野良 (stray/wild) suggests something unofficial or uncontrolled.
野良アプリをインストールすると、ウイルスに感染するリスクがある。
Installing sideloaded apps carries a risk of virus infection.
この野良アプリは公式ストアにはないけど、
This unverified app isn't on the official store, but it has useful features.